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Biology

A natural science concerned with the study of life or living matter in all its forms and phenomena, especially in relation to their origin, growth, reproduction, structure, behaviour and evolution.

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Biology > Ecology

drawdown

Biology; Ecology

Dropping water levels in a dam or reservoir. Also: the overuse of resources faster than they can be replaced. See Oil.

evapotranspiration

Biology; Ecology

The evaporation of water off leaf surfaces. A natural event, but can cause plants to lose too much water in dry times.

matric force

Biology; Ecology

The attraction that holds water to soil particles. Contributes to soil cohesion and the formation of helpful colloids.

aphelion

Biology; Ecology

A high-pressure system that spirals outward clockwise in the Northern Hemisphere and counterclockwise in the Southern.

dynamic metamorphism

Biology; Ecology

Metamorphism that changes a rock's shape without changing it chemically. Sometimes associated with mountain-building.

mafic

Biology; Ecology

Dark-colored, igneous, and high in iron and magnesium and other heavy elements (as in gabbro and basalt). See Felsic.

stamen

Biology; Ecology

A pollen-generating stalk at the base of a flower's petals. Flowers typically have six of them, just to make certain.